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Copper-doped ZnSnO3 visible light photocatalyst and preparation method thereof

A photocatalyst and visible light technology, which is applied in the field of copper-doped ZnSnO3 photocatalyst and its preparation, can solve the problems of difficult to change the energy band structure of the system, and achieves improved quantum conversion efficiency, good stability and recovery, and reduced recombination. effect of chance

Inactive Publication Date: 2013-03-13
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is difficult to change the band structure of the system by means of recombination.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After grinding copper oxide, zinc oxide and tin oxide powder, according to the stoichiometric ratio of Cu 0.01 Zn 0.99 SnO 3 Ingredients: Pour the prepared powder into the reactor, add nitric acid with a mass percentage concentration of 0.2% to the beaker, and the ratio of tin oxide to the added nitric acid is 0.2; stir to fully dissolve the powder, add mass Ammonia water with a percentage concentration of 0.2%, adjust the pH value to 9, so that the metal oxide ions are completely precipitated; wash, filter and dry the precipitate, put it in a muffle furnace for calcination at 500 degrees Celsius for 2 hours, take it out and cool it in the air; The obtained product was added to simulated organic pollutants, which were prepared from acid red with a concentration of 20 mg / L, and the added amount of the prepared photocatalyst was 1 g / L. The reactor is made of borosilicate glass; the light source is a 300-watt xenon lamp, which is filtered to allow light with a wavelengt...

Embodiment 2

[0018] After grinding copper oxide, zinc oxide and tin oxide powder, according to the stoichiometric ratio of Cu 0.07 Zn 0.93 SnO 3 Ingredients: Pour the prepared powder into the reactor, add nitric acid with a mass percentage concentration of 1% to the beaker, the ratio of tin oxide to the added nitric acid is 1; stir to fully dissolve the powder, add mass The percentage concentration is 2% ammonia water, adjust the pH value to 11, so that the metal oxide ions are completely precipitated; wash, filter and dry the precipitate, put it in a muffle furnace for calcination at 700 degrees Celsius for 1 hour, take it out and cool it in the air. The obtained product was added to simulated organic pollutants, which were prepared from acid red with a concentration of 20 mg / L, and the added amount of the prepared photocatalyst was 1 g / L. The reactor is made of borosilicate glass; the light source is a 300-watt xenon lamp, which is filtered to allow light with a wavelength above 420 n...

Embodiment 3

[0020] After grinding copper oxide, zinc oxide and tin oxide powder, according to the stoichiometric ratio of Cu 0.1 Zn 0.9 SnO 3 Ingredients: Pour the prepared powder into the reactor, add nitric acid with a mass percentage concentration of 0.6% to the beaker, and the ratio of tin oxide to the added nitric acid is 0.6; stir to fully dissolve the powder, add mass The percentage concentration is 1.6% ammonia water, adjust the pH value to 10, so that the metal oxide ions are completely precipitated; wash, filter and dry the precipitate, put it in a muffle furnace for calcination at 600 degrees Celsius for 2.5 hours, take it out and cool it in the air. The obtained product was added to simulated organic pollutants, which were prepared from acid red with a concentration of 20 mg / L, and the added amount of the prepared photocatalyst was 1 g / L. The reactor is made of borosilicate glass; the light source is a 300-watt xenon lamp, which is filtered to allow light with a wavelength ...

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Abstract

The invention discloses a copper-doped ZnSnO3 visible light photocatalyst and a preparation method thereof. The preparation method comprises the steps of: preparing copper oxide, zinc oxide and tin oxide according to stoichiometric proportion CuxZn<1-x>SnO3, wherein x is smaller than or equal to 0.1; carrying out coprecipitation process and low-temperature calcining to obtain the copper-doped ZnSnO3 visible light photocatalyst with good stability. The photocatalyst has higher quantum conversion efficiency and stability and can be directly applied to treat waste water of the printing and dyeing industry.

Description

Technical field [0001] The present invention involves a copper doped znsno 3 The photocatalyst and its preparation methods belong to the field of semiconductor photocatalytic technology. Background technique [0002] Semiconductor photocatalytic research is the frontier topic in the field of materials and chemistry, and has broad application prospects in new energy and environmental purification.Traditional semiconductor photocatalytic materials are only applicable to the range of ultraviolet light. Exploring the full use of sunlight optical response photocatalytic materials is the key to advancing the application of photocatalytic materials.Although the energy gap between the semiconductor price zone and the guide zone can be reduced, the electrons that stimulate the price belt with lower energy to the optical belt can be transformed to the guide zone and forming an electron-grounded pair, but at the same timeIt is easier to re -combine to react to the surface of the catalyst to...

Claims

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Application Information

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IPC IPC(8): B01J23/835
Inventor 姚毅曾鸿鹄林华
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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